Tony S. for Model Number KSB5BU3 Hi, I have the KSB5BU3 blender and the whats left on the blender is a concave metal piece about 1 inch in diameter with six small holes evenly spaced around it. This doesn't look like the plastic couplers that I've seen for the KSB5BU4. Does the BU4 fit the BU3?
Answer Hello Tony! We've researched the KSB5BU3 models further and received information from Whirlpool. According to the manufacturer the coupling, part number WP9704230, is the correct replacement. Thanks! Read More... Answered by AppliancePartsPros.com | Tuesday, June 19, 2012